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3 years ago

HEEEELP PLEASEEEE !!!

Mathematics

1 answer:

zhannawk [14.2K]3 years ago

6 0

Give me a few minutes.

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Softa [21]

$180^o-112^o=68^o$

$\left\{\begin{array}{ccc}2x+3y=68&|\cdot(-15)\\30x+11y=112\end{array}\right\\\underline{+\left\{\begin{array}{ccc}-30x-45y=-1020\\30x+11y=112\end{array}\right}\\.\ \ \ \ \ \ \ -34y=-908\ \ \ |:(-34)\\\\.\ \ \ \ \ \ \ \ \ \ \ y=\dfrac{908}{34}\to y=\dfrac{454}{17}\\\\2x+3\cdot\dfrac{454}{17}=68\ \ \ \ |\cdot17\\\\34x+1362=1156\ \ \ \ |-1362\\34x=-206\ \ \ \ |:34\\\\x=-\dfrac{206}{34}\to x=-\dfrac{103}{17}\\\\ \left\{\begin{array}{ccc}x=-\dfrac{103}{17}\\\\y=\dfrac{454}{17}\end{array}\right$

8 0

3 years ago

Help please if m1 = 72 then find the value of m3

Dima020 [189]

m<3 =72°

This is because m<1 and m<3 are vertically opposite.

8 0

2 years ago

Can anyone help me on this problem, please? It's from a section on literal equations.

Agata [3.3K]

If he charges $145 he worked for 5 hours at $20 an hour

4 0

3 years ago

Read 2 more answers

What is the simplified expression for Negative 3 (2 x minus y) + 2 y + 2 (x + y)?

Lana71 [14]

Answer:

$7y - 4x$

Step-by-step explanation:

$-3 (2x-y)+2y+2(x+y)\\$

Step 1: Open the brackets

$= -6x+3y +2y +2(x+y)\\=-6x +3y + 2y +2x + 2y$

Step 2: Bring the similar variables together

$=-6x +2x \ +3y + 2y + 2y$

Step 3: Simplify by adding/subtracting the coefficients of the similar variables

$= - 4x +7y$

Step 4: Rearrange as required.

5 0

3 years ago

Read 2 more answers

If the number of hours you hours you work is proportional to the amount of money you earn per hour, which og tye following state

Basile [38]

Answer:

it should be a

Step-by-step explanation:

if you work for $10 an hour, and work for 2 hours, you make $20 but if you double the hours worked, so 4 hours, you make $40, which is double the hours, and double the money

3 0

3 years ago